Contour for couplings.



E. P. KINNE & H. BLANGHARD.

CONTOUR FOR COUPLINGS.

APPLICATION FILED AUG. 26, 1912.

Patented Dec. 8, 1914.

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wrmdel m 7711/9/210/1) Kiwi/fa /7/L/@ E. P. KINNE & H. BLANOHARD.

CONTOUR FOR COUPLINGS. APPLICATION TILED AUG. 26.1912.

fatented Dec. 8,1914.

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E. P. KINNE & H. BLANGHARD. CONTOUR FOR COUPLINGS. APPLICATION FILEDAUG. 26.1912.

1,120,060. Patented Dec. 8,1914.

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r UNITED" "STATESEPATENTOFFICE EDMUND P. KINNE'ANDHENRY fiANcHAm'),OF-ALLIANCE, 01110, assIGNoRs 'ro AMERICAN STEEL FOUNDRIES, or NEW YO K,N. Y, a conrom'rrou or NEW JERSEY.

conrroua FOR cocrLrNGs.

Specification of Letters Patent. Dec, 8 1914,

Application filed August 26, 1912. Serial No. 716,994.

To whom it concern:

Beit'known thatwe, :EDMQND P. Kmim and HENRY. BLANCHARD, citizens of theUnited States, residing at Alliance," in the county of Stark andstatefzof Ohio, have invented certain newland useful'Improvements in NewContour for Couplers, of which the following is a specification.

Our'invention relates to that class of car couplers knownas the M. (LB.typewhich employ a pivoted knuckle, a'lockther'efor and a lifter foroperating the lock; and more particularly relates tojan improvement inthe form) of the outline orcontour andthe location. of; thehook orknuckle pivot pin center in relation thereto,

.The principal objects gained by proved contour are as follows: First:increase of strength, U to 41%"over couplers. constructed with the M. C.13,. standardi'contour jlines) through those sections' defifned by'astraight line pa'ssing transversely-through; the knuckle piv'ot pincen'ten; Experience has shown that av large portion of the failure of-:carcouplers; has been due to'fracturethrough the lugs or cars ofthe-coupler head and through the pivot pin hole of-the'lmuckle.

Second: increase of strength-j of wall' through'that portion of headknown as the face of the'coupler. Experience has also shown'that alargeproportion of the car coupler failures hasfbeen due to fracture ofthernetal at this location. i

Third: greater ease in coupling, either on a straight track withcouplers off of center line of cars or while cars are on short curves;

ability-j for coupled cars having this imve coupler to turn curves ofshorter radii; T J

Fourth: decreased liability of unintentional disengagement of matingcouplers.

Fifth: increased length of useful life of car couplers having ourimprovements; ex,- perience has shown that many couplers reach the endof their usefulness by-wearing out on the inner 0r pulling face of thehook or knuckle-and at other bearing. points, causing the distance fr0mthe face of the hook to the guard arm opposite to increase to such anamount as to'allow two couplers to slip by one another, thus causingunintentional uncoupling. The object here gained is to provide such ashape as to increase the our p v position of two improvedco'uplersjwhenthe amoun ng avoid confusion.

period during which the permissible wear will take place.

Our invention willbe stood 'by referencetofth accompanying drawings,wherein Figure 1' shows. in full carfc'ou;

" readily iunder plers having our 'im'provedj contolir, 'the dottedlines illustratin g ithe standard con tour Fig. 2 shows two couplers ofimproved contour 1n engagementfillustrating the'ex tent ofangularamov'e'ment permitted; Fig. 3

shows a coupler of -improved cimtour in full lines in engagement Witha'standard M. CJB. coupler, shown in' dotted fuses, and alsoillustrating in dotand' -dash lines the ex treme angular "movement"permitted, such relation; F 4 shows the} normal coupled center linescoincide and also'shows in-dotted lines the positi'onofmaximuin-"lateral displacement when center lines'are parallelz andfifshows' the; relationof a coupler having our improved eontour'whenmated with a coupler of standafrd contour, center lines being paralleland displaced laterally In, F g; 1, thef' dimensionand radius lilie havebeen applied; to only"'one coupler; to

'Referring to'Fig. 1- it will .be Seen that the contour is constructedabout the two center lines X- X and set at right angles to each other.The methodof'construc tion is as followsz With radius a'two arcs aredrawn tangent 'to'straightline'f Y which passes through intersection ofcenter lines X-X and O() at adangl of 30 to line 0-0; the centersfromiwhich these arcs are struck are placed a distance from line X-X.lVith radius b arcs F and C are struck fromycenter located by dimensionsand mandil? and n respectively. Arcs 'E. and Fiind C and D are thenjoined by tangent straight lines. With radius c arcs-are struck fromcenters located by dimensions h and 7' and by -2' and k and same arejoined up with tangent straight lines. to fares F and C. Arc C whose;center is determined by i and lc joinedby a straight line tangent" tofit which passes through the point located by dimensions f, plus u and'v to the are passing tour of amounts as indicated at point C andatpoint 1 whereby the transverse dimension through thelugs'or ears ofthe coupler head and through the pin hole cen ter of the knuckle isincreased;'it is further. accomplished by the location of the pivot pinhole center eccentrically with the arcs describing the lugs of the head,this location is such that with the use of thes tandard M. C. B. knucklepivot pin (1%") the thickness of the wall from. inner edge of pin holeto inner edge of contour at locatmn C exceeds the thickness of the wallfrom outer edge of pin hole to outer edgeof oontour at I by 21% andaffords an increase of &1% in the moment of inertia (referred to pinhole center) of this transverse sectionthrough the pin hole center overthe similar moment of inertia of a coupler constructed on the lines ofthe M. C. B. Association and with the pivot pin hole located concen-.

trically with the arc'defining the lugs of the head; this is illustratedby Fig. 1, where it will be seen that X dimens on for the improvedcontour exceeds a corresponding or 3/ dimension forthe M. C. B. contourand that the pin center for theimproved contour is located 6 distancefrom the center from which are is struck by radius Z, defining the earsor lugs of the coupler head, while the center for the pin hole .with theM. C. B. contour is located at the same point as center for eneratingare struck by radius Z to de e the ears of coupler heads having the M.C. B. contour lines. Experience has shown that a large proportionoj/th'e knuckles and bars break 'from the pin hole inwardly to inneredge of the contour and to eliminate this and all other breakage ofknuckle and head at this general location is the object gained.

' The second object is attained by an addition, as indicated at point B,to enable a thicker face wall to be obtained and thus eliminatethebreakages atthis point; experience shows that failures of car couplersat this location have been very frequent; it is to be noted that thisincrease is obtained without change in the relative position between thecoupling face (inner curve of knuckle contour) and lock of the coupler.

The third object is attained by, first, re-

ducing the length of the point of the knuckle by removing metal asindicated at F to increase the transverse dimension from point of guardarm to point of knuckle, (w Fig. l) to enable the mating coupler toenter the recess between knuckle and head more readily and, second, bythe combination of the changes as indicated at points A, D, F, and G, toenable a like improved coupler mating to take a position of maximumangle to 16% as compared with 151} for two mating couplers of the M.C.B. standard contour lines.

The fourth object is attained by metal added at location H which causesthis portion of'the closed knuckle of a mating improved coupler to comein contact with the guard arm of mate after a lateral displacement lessby "3/32 than the lateral 1 displacmeiit obtained with two matedcoupiers of ithestandard Master Car Builders Association lines,- (themeasurement in this case-being 9/16" while in the case of two new.improved couplers it is 15/32"), this is illustrated by F1 i and it willbe seen that this greatly re uces the liability to become disengagedfrom the mating coupler.

The fifth object is attained, first; by an addition of an amount atlocation E which aifords this, increased amount of metal as additionalmaterial to be worn away before such an opening between point of knuckleand guard arm (minimum measure ment) is reached that will condemn thecoupler from further service, for experience has shown that it is atthis location where the greatest amount of wear to the contour takesplace. This object is secondly accomplished by removing mm location D anamount of metal exactly equal to that amount added at location E so thatthe to by means of this increased slope (greater depth to the reentrantcurve) there is caused increased liability for two im proved couplerswhen mated to wear toward each other, thus transferring the point ofgreatest wear inwardly and increasing the length of useful life of thecoupler; this construction has the further advantage that it assists toreduce the liability for couplers to become uncoupled unintentionally asit is evident that-the increased hook shape at this portion of thecontour will tend to hold couplers together. By referring to Fig. 4 itwill be seen how this increased hook shape as formed by arcs E-D and DEare of Such shapes as to draw two mating couplers together until. theircenter lines coincide.

Having shownhow the above mentioned ob ects are accomplished a furtherobject of our improvement is that the improved coupiers o the contourdescribed herein couple oining arcs struck with radii a and a -makeswith center line 0-0 is increased angle which the short tangent straightline I interchangeably with perfect freedom with couplers of thestandard Master Car Builders Association contour lines as is evidentfrom Figs. 3 and 5, and also couple with couplers having the standardMaster Car Builders Association contour lines in such a manner that theliability to become uncopled is reduced as compared with two couplers ofM. C. B. lines.

of which includes arcs A, B C 1 u E n 4 F a u H n and t I a joined ycertain straight lines, substantially as shown and described.

3. A coupling head, the contour of which includes are A, are C struckfrom centers located by dimensions 2' and k and joined by a tangentstraight line, and that are struck by d which passes between pointslocated by dimensions g and p, substantiall as shown anddescribed.

EMUND P. KINNE. HENRY BLANCHARD. Witnesses:

LAURA CARLISLE, J. E. RYAN.

' copies of this patent may be obtained for the cents each, byaddressing the Commissioner of Patents,

Wuhlngton, D. O.

